Which sentence most effectively uses a formal style and tone?

C). I have no joy of this contract to-night:

It is too rash, too unadvised, too sudden;

Too like the lightning, which doth cease to be.

Explanation:

A thesis statement is demonstrated as the statement that relates the central idea or claim of the paper.

As per the question, the line that supports the given thesis statement is reflected through option C as it involves the description that validates Juliet's maturity. When she says 'I have no joy' and 'It is too rash...unadvised...sudden', she mirrors her 'rationality and sanity' as she was galvanized at Romeo's extended proposal(reflected by the comparison of his sudden proposal to 'lightning'). Her comparison reflects her maturity as she knew such(large) promises are difficult to be kept and like lightning, it glows at a moment and leaves at the other. Thus, option C substantiates the given thesis statement.